I see two reasons for this: Those untrained in economics are likely to be confused by its terminology, and by the fact that common words often acquire very precise, but unfamiliar, meanings. Furthermore, laymen are likely to be unfamiliar with the environments and institutions in which basic economic decisions are made.
I suppose that students majoring in economics acquire practical experience by spending some time in business firms, banks, stock market firms, government decision-making agencies, etc. This is probably built into their academic curricula. But a layman, like myself, usually does not have such exposure. My economic experience is limited to salaries, paying for goods and services, taxes, and minimum banking (saving accounts, credit cards, mortgages, etc.). Most people I know are in similar situations.
How can one compensate for this limited exposure? I suppose that some novels do describe the workings of the business world. Such books, however, were not written to educate us. It occurred to me that writers familiar with typical economic environments could help us by describing daily lives of typical business people, in articles, books, or even fictional form.
Economics is a very important subject. Unfortunately, most people are not familiar with it, even politicians who often talk about economy. What else can be done to improve the situation?